Invertebrate Paleoecology and Ichnology

• B.A., 1968, Augustana College, Rock island, IL
• M.A., 1973, Rice University, Houston, TX
• Ph.D., 1974, Rice University, Houston, TX

Paleontology and paleoecology of marine invertebrates; animal-sediment interrelationships in continental, intertidal, shallow-marine and deep-sea environments; sedimentologic, stratigraphic, ethologic and environmental implications of trace fossils and ichnofabrics.

Benner, J. S., Ekdale, A. A., and Gibert, J. M. de, 2008, Enigmatic organisms preserved in early Ordovician macroborings, western Utah, USA: In Wisshak, M., and Tapanila, L., Ed., Current Developments in Bioerosion: Springer-Verlag, Berlin, p. 55-64. 

Ekdale, A. A., Bromley, R. G., and Loope, D. B., 2007, Ichnofacies of an ancient erg: a climatically influenced trace fossil association in the Jurassic Navajo Sandstone, southern Utah, U.S.A.: In Miller, W., III, Ed., Trace Fossils: Concepts, Problems, Prospects: Elsevier, Amsterdam, p. 562-574.

Tapanila, L., and Ekdale, A. A., 2007, Early history of symbiosis in living substrates: trace fossil evidence from the marine record: In Miller, W., III, Ed., Trace Fossils: Concepts, Problems, Prospects: Elsevier, Amsterdam, p. 345-355.

Difley, R. L., and Ekdale, A. A., 2006, Trace fossils and paleoenvironments of the Early Jurassic Kayenta Formation, Washington County, Utah: In Proceedings, 20th Desert Symposium, CSU Desert Research Center, CA.

Ekdale, A. A., 2006, Paleozoic bivalve borings: In McGraw-Hill Yearbook of Science & Technology 2006: McGraw-Hill, New York, p. 221-224.

Ekdale, A. A., & Tripp, A., 2005, Paleontological sonification: letting music bring fossils to your ears: Jour. of Geoscience Education, 53:271-280.

Benner, J. S., Ekdale, A. A., Gibert, J. M. de, 2004, Macroborings (Gastrochaenolites) in Lower Ordovician hardgrounds of Utah: sedimentologic, paleoecologic, and evolutionary implications: Palaios, 19:543-550.

Ekdale, A. A., & Bromley, R. G., 2003, Paleoethologic interpretation of complex Thalassinoides in shallow-marine limestones, Lower Ordovician, southern Sweden: Palaeogeography, Palaeoclimatology, Palaeoecology, 192:221-227.

Ekdale, A. A., & Lamond, R. E., 2003, Behavioral cladistics of trace fossils: evolution of derived trace-making skills: Palaeogeography, Palaeoclimatology, Palaeoecology, 192:335-343.

Gibert, J M. de, & Ekdale, A. A., 2002, Ichnology of a restricted epicontinental sea, Arapien Shale, Middle Jurassic, Utah, USA: Palaeogeography, Palaeoclimatology, Palaeoecology, 183:275-286.

Difley, R. L., & Ekdale, A A, 2002, Faunal implications of an environmental change before the Cretaceous-Tertiary (K-T) transition in central Utah: Cretaceous Research, 23:315-331.

Difley, R. L., & Ekdale, A. A., 2002, Footprints of Utah’s last dinosaurs: track beds in the Upper Cretaceous North Horn Formation of the Wasatch Plateau, central Utah: Palaios, 17:327-346. 

Ekdale, A. A., Benner, J. S., Bromley, R. G., & Gibert, J. M. de, 2002, Bioerosion of Lower Ordovician Hardgrounds in Southern Scandinavia and Western North America: Acta Geologica Hispanica, 37:9-13.

Ekdale, A. A., & Bromley, R. G., 2001, A day and a night in the life of a cleft-foot clam: Protovirgularia-Lockeia-Lophoctenium: Lethaia, 34:119-124.

Ekdale, A. A., & Bromley, R. G., 2001, Bioerosional innovation for living in carbonate hardgrounds in the Early Ordovician of Sweden: Lethaia, 34:1-12.

Martinell, J., Gibert, J. M. de, Domenech, R., Ekdale, A. A., & Steen, P. P., 2001, Cretaceous ray traces?: An alternative interpretation for the alleged dinosaur tracks of La Posa, Isona, NE Spain: Palaios, 16:437-444.